"Shell Shock – Part I" – When a Navy Lieutenant who recently returned home from the Middle East is found dead, the NCIS team questions the victim's friend, Marine Captain Joe Wescott. Gibbs realizes the Captain is suffering from post-traumatic stress disorder, but knows his experience overseas may also provide a key link to the crime, on a rebroadcast of NCIS, Tuesday, Jan. 22 (8:00-9:00 PM, ET/PT) on the CBS Television Network. Brad Beyer ("Jericho") guest stars as Captain Joe Westcott. (Originally broadcast 11/13/12.)